CN114165318A - Integrated device inner core for recovering waste heat of tail gas of internal combustion engine and post-processing - Google Patents
Integrated device inner core for recovering waste heat of tail gas of internal combustion engine and post-processing Download PDFInfo
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- CN114165318A CN114165318A CN202111501725.5A CN202111501725A CN114165318A CN 114165318 A CN114165318 A CN 114165318A CN 202111501725 A CN202111501725 A CN 202111501725A CN 114165318 A CN114165318 A CN 114165318A
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- flue gas
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- tail gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy the devices using heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
- F01N3/106—Auxiliary oxidation catalysts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
- F01N3/108—Auxiliary reduction catalysts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention discloses an integrated device inner core for recovering and post-treating tail gas waste heat of an internal combustion engine, which comprises an inner core shell with a closed cavity structure and a metal partition plate, wherein the metal partition plate is uniformly arranged in the inner cavity of the inner core shell, and a flue gas channel and a working medium channel which are distributed at intervals are formed in the inner cavity of the inner core shell, the flue gas channel is used for filtering tail gas flowing along the arrangement direction of the flue gas channel, a heat exchange working medium with the flow direction opposite to that of the tail gas is arranged in the working medium channel, and the heat exchange working medium and the tail gas perform countercurrent heat exchange on two sides of the metal partition plate. According to the invention, the smoke is subjected to the steps of filtering and heat exchange simultaneously through the structural design of the inner core shell and the metal partition plate, the particle trapping and heat exchange functions of the smoke of the diesel engine are realized through smaller overall volume and weight, the feasibility of the waste heat recovery technology of the internal combustion engine is improved, the energy utilization efficiency of the internal combustion engine is further improved, and the method has important significance for energy conservation and emission reduction in the application industry of the internal combustion engine.
Description
Technical Field
The invention relates to the technical field of energy utilization, in particular to an inner core of an integrated device for recovering and post-treating tail gas waste heat of an internal combustion engine.
Background
Internal combustion engines are widely used in the fields of vehicles, ships and other mobile devices, stationary generator sets, engineering and agricultural machinery and the like due to the advantages of high efficiency, high energy density, good fuel adaptability and the like. China is the largest internal combustion engine manufacturing country and the largest internal combustion engine consuming country in the world, the sales volume of the internal combustion engines in 2019 is 4712.3 thousands, and the total power reaches 24.37 hundred million kilowatts. The exhaust gas from internal combustion engines usually contains CO2, CO, HC and NOxAnd the environment pollutants, therefore, the development of the energy-saving and emission-reducing technology aiming at the internal combustion engine has important significance for relieving the energy demand of China and reducing the emission of pollutants.
The internal combustion engine outputs energy by means of rapid expansion work of compressed gas in a cylinder caused by violent combustion of fuels such as gasoline, diesel oil and the like, but the thermal efficiency of the internal combustion engine is only about 40 percent, and the rest energy is dissipated in modes of exhaust waste heat (about 30 percent), cylinder sleeve water waste heat (about 25 percent) and the like. In this case, it is necessary to realize the recycling of the heat energy of the fuel of the internal combustion engine by using a waste heat recovery technology, and finally, the energy utilization rate of the internal combustion engine is improved. With the increasing strictness of the emission limit of internal combustion engines at home and abroad, the emission standard can not be directly met by only depending on optimizing the combustion of the internal combustion engine and other processes. Therefore, main manufacturers adopt DOC, scr, dpf, and other post-processors to ensure that the diesel exhaust gas meets the severe emission standards. The diesel particulate filter DPF is used for filtering most particulate matters in the tail gas, is a non-second choice for ensuring that the particulate matters in the tail gas reach the standard, and is also one of devices with the largest volume and weight in an aftertreatment system.
A conventional patent publication No. CN205297692U discloses a renewable wall-flow particulate trap system for a diesel engine, which includes a diesel engine, and a selective catalytic reduction catalyst SCR, an oxidation catalyst DOC, and a wall-flow particulate trap DPF are sequentially installed after an exhaust system of the diesel engine. The DPF regeneration adopts a mode of combining active regeneration and passive regeneration, can reduce more than 90% of the total particulate matter emission amount of the diesel engine, obviously reduces the particle number, and can meet the particle requirement of the urban vehicle on the emission of the fifth stage of Beijing and the emission requirement of the vehicle with special requirements on the particle number. But the waste heat recovery system is not arranged, so that the energy is greatly wasted.
The prior patent publication No. CN202119301U discloses a novel heat exchanger for recovering the waste heat of high-temperature tail gas, the heat exchange structure is characterized by comprising a unit heat exchange component, wherein the unit heat exchange component comprises metal heat exchange sheets, longitudinal strip-shaped sealing gaskets, transverse strip-shaped sealing gaskets, connecting rods and fastening screws, the two metal heat exchange sheets and the two longitudinal strip-shaped sealing gaskets clamped at the two ends of the two metal heat exchange sheets form heat exchange single bodies, the two transverse strip-shaped sealing gaskets are clamped at the two sides between every two adjacent heat exchange single bodies stacked up and down, the four connecting rods respectively penetrate through the four corners of the metal heat exchange sheets and the end parts of the longitudinal strip-shaped sealing gaskets and the end parts of the transverse strip-shaped sealing gaskets positioned on the corners, and the fastening screws are screwed at the ends of the connecting rods to tightly connect the heat exchange single bodies stacked up and down and the transverse strip-shaped sealing gaskets positioned between the heat exchange single bodies to form a longitudinal heat exchange channel and a transverse heat exchange channel which are perpendicular to each other. Compared with the prior art, the heat recovery device has the advantages of good use effect, long service life, easy maintenance and high heat recovery efficiency or utilization rate. But the particle trapping device is not arranged, and the exhaust emission standard cannot reach the standard.
The waste heat recovery system needs to arrange at least one flue gas heat exchanger in an exhaust pipeline, and the volume and the weight of the waste heat recovery system are also outstanding. Therefore, it is difficult to properly install both of them in a limited space.
Disclosure of Invention
The technical problem to be solved by the invention is how to realize the post-treatment of the tail gas of the internal combustion engine and the waste heat recovery in the tail gas treatment device.
The invention solves the technical problems through the following technical means: the utility model provides an integrated device inner core for internal-combustion engine exhaust waste heat recovery and aftertreatment, is including inner core casing, the metal baffle that has closed cavity structures, the metal baffle evenly sets up at inner core casing inner chamber, and makes inner core casing inner chamber form interval distribution's flue gas runner and working medium runner, the flue gas runner is used for filtering along its tail gas that arranges the direction flow, be equipped with in the working medium runner with tail gas flow opposite direction's heat transfer working medium, heat transfer working medium and tail gas are at metal baffle both sides countercurrent exchange.
Through the structural design of the inner core shell and the metal partition plate, the smoke is subjected to the steps of filtering and heat exchange at the same time, the particle trapping and heat exchange functions of the smoke of the diesel engine are realized through smaller overall volume and weight, the feasibility of the waste heat recovery technology of the internal combustion engine is improved, the energy utilization efficiency of the internal combustion engine is further improved, and the method has important significance for energy conservation and emission reduction in the application industry of the internal combustion engine.
According to the preferable technical scheme, a plurality of medium filtering bodies with rhombus-like cross sections are arranged in the flue gas flow channel, the center of each medium filtering body is provided with a porous structure for tail gas to flow in and forms a flue gas inflow channel, the medium filtering bodies and the peripheral inner walls of the flue gas flow channel are enclosed to form a plurality of flue gas outflow channels, through the arrangement of the medium filtering bodies, the advantage of small pressure drop of the wall-flow particle trap is integrated, meanwhile, through the rhombus structural design, the radial temperature gradient in the channels is increased, the heat exchange performance is improved, the temperature gradient distribution in the channels is directionally improved, the catalytic reaction of the medium filtering bodies is facilitated to be deployed, and meanwhile, the diamond-shaped cross section porous carrier can be used to obtain a higher heat exchange area under the constraint of certain processing precision.
According to a preferable technical scheme, the medium filtering bodies are sequentially arranged side by side along the width direction of the inner core, the medium filtering bodies, the metal partition plates and the inner core shell are enclosed to form a first flue gas outflow channel, and the adjacent medium filtering bodies and the metal partition plates are enclosed to form a second flue gas outflow channel.
As a preferred technical scheme, an inlet channel end plug is arranged in the medium filter body, an outlet channel end plug is fixed at one end of the second smoke outflow channel parallel to the smoke inflow channel inlet, tail gas enters the inner cavity of the smoke inflow channel from the inlet of the smoke inflow channel and is blocked by the inlet channel end plug to enter the smoke outflow channel in a wall flow manner, the tail gas can be prevented from directly entering the smoke outflow channel without being filtered by the arrangement of the end plug, and the whole filter body becomes wall-flow type filtration by the arrangement of the inlet channel end plug, so that the functions of trapping particulate matters and exchanging heat can be realized simultaneously on the premise of small pressure drop.
As an optimized technical scheme, a working medium inlet and a working medium outlet are formed in the inner core shell, the working medium inlet and the working medium outlet are communicated with a working medium flow passage, and the tail gas in the smoke outflow passage and the working medium in the working medium flow passage perform countercurrent heat exchange through the metal partition plate.
As the preferred technical scheme, the medium filter body is detachably fixed on the inner wall of the flue gas flow channel and tightly attached to the inner wall, and the detachable fixing mode is different from the welding in the prior art, so that the medium filter body is different from the prior metal fin and can be detached, washed and replaced.
As a preferable technical scheme, the cross sections of the first flue gas outflow channel and the second flue gas outflow channel are both triangular, and due to the special characteristics of the triangular flue gas outflow channel, the balance between the heat exchange performance and the pressure drop performance can be well obtained on the premise that the medium filter body is kept at a higher temperature and can meet a certain catalytic reaction.
According to the preferable technical scheme, the medium filter body is coated with the catalyst, and the catalyst is arranged, so that the functions of trapping particulate matters, catalytic conversion and heat exchange of the tail gas of the diesel engine can be realized by virtue of a compact structure in the medium filter body under the premise of small pressure drop and with smaller overall volume and weight.
As a preferable technical scheme, the catalyst is a reduction catalyst or an oxidation catalyst, and different types of catalysts can be coated according to later-stage requirements so as to flexibly meet different pollutant catalytic conversion requirements, so that the treated flue gas can meet emission regulations of different standards.
As a preferred technical scheme, the flue gas inflow channel is a single-layer diamond-like channel.
The invention has the advantages that:
(1) according to the invention, the smoke is subjected to the steps of filtering and heat exchange simultaneously through the structural design of the inner core shell and the metal partition plate, the particle trapping and heat exchange functions of the smoke of the diesel engine are realized through smaller overall volume and weight, the feasibility of the waste heat recovery technology of the internal combustion engine is improved, the energy utilization efficiency of the internal combustion engine is further improved, and the method has important significance for energy conservation and emission reduction in the application industry of the internal combustion engine.
(2) According to the invention, through the arrangement of the medium filter body, the advantage of small pressure drop of the wall-flow type particle trap is integrated, and meanwhile, through the rhombic structure design, the radial temperature gradient in the channel is increased, the heat exchange performance is improved, the temperature gradient distribution in the channel is directionally improved, the catalytic reaction in the process of deploying the medium filter body is facilitated, and meanwhile, a higher heat exchange area can be obtained under the constraint of certain processing precision by using the porous carrier with the rhombic section.
(3) In the invention, the detachable fixing mode is different from the welding in the prior art, so that the detachable fixing mode is different from the prior metal fin, and the medium filter body can be detached, washed and replaced.
(4) In the invention, the cross section of the smoke outflow channel is designed into a triangle, so that the balance between the heat exchange performance and the pressure drop performance can be better obtained on the premise of maintaining the medium filter body at a higher temperature and meeting a certain catalytic reaction.
(5) According to the invention, through the arrangement of the catalyst, the functions of trapping particulate matters, catalytic conversion and heat exchange of the tail gas of the diesel engine can be realized by using smaller overall volume and weight by virtue of an internal compact structure on the premise of small pressure drop.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an integrated device core for recovering and post-treating waste heat of tail gas of an internal combustion engine provided by the invention;
FIG. 2 is a schematic cross-sectional structural diagram of an inner core of an integrated device for recovering and post-treating waste heat of tail gas of an internal combustion engine, provided by the invention;
FIG. 3 is a schematic structural diagram of a media filter of an inner core of an integrated device for recovering and post-treating waste heat of tail gas of an internal combustion engine, provided by the invention;
reference numerals: 1. a working medium flow passage; 2. the flue gas flows into the channel; 3. a media filter body; 4. a flue gas outflow channel; 41. a first flue gas outflow channel; 42. a second flue gas outflow channel; 5. a metal separator; 6. an inlet channel end plug; 7. an outlet passage end plug; 8. a working medium inlet; 9. and a working medium outlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 3, an integrated device core for recovering and post-treating waste heat of exhaust gas of an internal combustion engine comprises: the filter comprises an inner core shell, a medium filter body 3, a metal partition plate 5, an inlet channel end plug 6 and an outlet channel end plug 7; a closed cavity structure is formed in the inner core shell, the metal partition plates 5 are uniformly arranged in the inner cavity of the inner core shell, the metal partition plates are preferably distributed along the height direction of the inner core, the space between the metal partition plates 5 can be reasonably arranged according to actual treatment requirements, the inner core shell and the metal partition plates 5 are made of the same metal plate material, the inner cavity of the inner core shell is divided into a flue gas channel and a working medium channel 1 which are distributed at intervals by the plurality of metal partition plates 5, the flue gas channel is used for filtering tail gas flowing along the arrangement direction of the flue gas channel, a heat exchange working medium which is opposite to the flowing direction of the tail gas is arranged in the working medium channel 1, a working medium inlet 8 and a working medium outlet 9 are arranged on the inner core shell, the working medium inlet 8 and the working medium outlet 9 are both communicated with the working medium channel 1, the working medium enters the working medium channel 1 from the working medium inlet 8 and flows out from the working medium outlet 9 to perform countercurrent heat exchange with the tail gas in the flue gas channel on both sides of the metal partition plates 5, it should be noted that the working medium can be a refrigerant, heat conduction oil and water in the application, but is not limited to the refrigerant, the smoke is subjected to the steps of filtering and heat exchange through the structural design of the inner core shell and the metal partition plate 5, the particle trapping and heat exchange functions of the smoke of the diesel engine are realized through smaller overall volume and weight, the feasibility of the waste heat recovery technology of the internal combustion engine is facilitated to be improved, the energy utilization efficiency of the internal combustion engine is further improved, and the internal combustion engine has important significance for energy conservation and emission reduction in the application industry of the internal combustion engine.
Referring to fig. 2, a plurality of media filters 3 with diamond-like cross sections are arranged in the flue gas flow channel, the media filters 3 are sequentially arranged side by side along the width direction of the inner core, the media filters 3 are detachably fixed on the inner wall of the flue gas flow channel and tightly attached to the inner wall, so that the media filters can be detached, replaced and cleaned, a diamond-shaped porous structure for tail gas to flow in is arranged at the center of the media filters 3 to form a flue gas inflow channel 2, the media filters 3 and the inner wall around the flue gas flow channel surround to form a plurality of flue gas outflow channels 4, the cross sections of the flue gas outflow channels 4 are triangular, the media filters 3 can be kept at a higher temperature, and balance between heat exchange performance and pressure drop performance can be well obtained on the premise of satisfying a certain catalytic reaction, specifically, the media filters 3, the metal partition plates 5 and the inner core shell surround to form a first flue gas outflow channel (41), and adjacent media filters 3 and the metal partition plates 5 surround to form a second flue gas outflow channel (42), it should be noted that the medium filter body 3 is coated with a catalyst, the catalyst is a reduction catalyst or an oxidation catalyst, the tail gas enters the flue gas inflow channel 2 from the inlet of the flue gas inflow channel 2 and enters the plurality of flue gas outflow channels 4 through the medium filter body 3, the heat exchange between the filtered flue gas and the working medium is realized through the metal partition plate 5, and the heat exchange effect is improved because both are in a flowing state.
Referring to fig. 3, an inlet channel end plug 6 is arranged in the medium filter body 3, an outlet channel end plug 7 is fixed at one end of the second flue gas outflow channel 42 parallel to the inlet of the flue gas inflow channel 2, the shape of the outlet channel end plug 7 is matched with the shape of the first flue gas outflow channel 41 and the second flue gas outflow channel 42, tail gas enters the inner cavity of the flue gas inflow channel 2 from the inlet of the flue gas inflow channel and is blocked by the inlet channel end plug 6 to enter the flue gas outflow channel 4 in a wall flow manner, the medium filter body 3 is designed into a wall flow type filter body through the inlet channel end plug 6, the characteristic of small pressure drop is integrated, meanwhile, the radial temperature gradient in the channel is increased through the rhombic structure design, the heat exchange performance is improved, the temperature gradient distribution in the channel is directionally improved, the deployment of the catalytic reaction in the medium filter body 3 is facilitated, and meanwhile, the use of the rhombic section porous carrier can also be restricted by certain processing precision, a higher heat exchange area is obtained.
The using method comprises the following steps: the waste heat recovery system pipeline is connected to a working medium inlet of the integrated device and enters the working medium flow channel 1, tail gas enters an inner cavity of the waste heat recovery system pipeline from an inlet of the flue gas inflow channel 2 and is blocked by an inlet channel end plug 6 to enter a flue gas outflow channel 4 in a wall flow mode, the tail gas and the working medium perform countercurrent heat exchange on two sides of the metal partition plate 5, the working medium enters a power machine to do work through connecting the joint and the pipeline until an outlet 8, and the tail gas of the diesel engine can be trapped by using a small overall volume and weight and has a catalytic conversion and heat exchange function by coating a catalyst on the medium filter body 3 under the premise of small pressure drop by virtue of an internal compact structure.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides an integrated device inner core for internal-combustion engine tail gas waste heat recovery and aftertreatment, its characterized in that, including inner core casing, metal baffle (5) that have closed cavity structures, metal baffle (5) evenly set up at inner core casing inner chamber, and make inner core casing inner chamber form interval distribution's flue gas runner and working medium runner (1), the flue gas runner is used for filtering along its tail gas that arranges the direction flow, be equipped with the heat transfer working medium opposite with tail gas flow direction in working medium runner (1), heat transfer working medium and tail gas are at metal baffle (5) both sides countercurrent exchange.
2. The integrated device core for the waste heat recovery and aftertreatment of the tail gas of the internal combustion engine according to claim 1, wherein a plurality of medium filtering bodies (3) with diamond-like cross sections are arranged in the flue gas flow channel, a hole-shaped structure for the tail gas to flow in is formed in the center of each medium filtering body (3) to form a flue gas inflow channel (2), and the medium filtering bodies (3) and the peripheral inner walls of the flue gas flow channel are enclosed to form a plurality of flue gas outflow channels (4).
3. The integrated device core for the waste heat recovery and the aftertreatment of the tail gas of the internal combustion engine according to claim 2, wherein the medium filtering bodies (3) are sequentially arranged side by side along the width direction of the core, the medium filtering bodies (3), the metal partition plates (5) and the core shell enclose to form a first flue gas outflow channel (41), and the adjacent medium filtering bodies (3) and the metal partition plates (5) enclose to form a second flue gas outflow channel (42).
4. The integrated device core for the waste heat recovery and the post-treatment of the tail gas of the internal combustion engine according to claim 3, wherein an inlet channel end plug (6) is arranged in the medium filter body (3), an outlet channel end plug (7) is fixed at one end of the second flue gas outflow channel (42) which is parallel to the inlet of the flue gas inflow channel (2), and tail gas enters the inner cavity of the flue gas inflow channel (2) from the inlet of the flue gas inflow channel and is blocked by the inlet channel end plug (6) to enter the flue gas outflow channel (4) in a wall flow manner.
5. The integrated device inner core for the waste heat recovery and aftertreatment of the tail gas of the internal combustion engine according to claim 3, wherein a working medium inlet (8) and a working medium outlet (9) are formed in the inner core shell, the working medium inlet (8) and the working medium outlet (9) are both communicated with the working medium flow passage (1), and the tail gas in the flue gas outflow passage (4) and the working medium in the working medium flow passage (1) perform countercurrent heat exchange through the metal partition plate (5).
6. The integrated device inner core for the recovery and the aftertreatment of the waste heat of the tail gas of the internal combustion engine according to claim 3, wherein the medium filter body (3) is detachably fixed on the inner wall of the flue gas channel and is tightly attached to the inner wall.
7. The integrated device core for the waste heat recovery and aftertreatment of the tail gas of the internal combustion engine according to claim 4, wherein the cross sections of the first smoke outflow channel (41) and the second smoke outflow channel (42) are triangular.
8. The integrated device core for the recovery and aftertreatment of the waste heat of the tail gas of the internal combustion engine according to claim 2, wherein the medium filter body (3) is coated with a catalyst.
9. The integrated apparatus core for heat recovery and aftertreatment of internal combustion engine exhaust according to claim 8, wherein the catalyst is a reduction catalyst or an oxidation catalyst.
10. The integrated device core for the waste heat recovery and aftertreatment of the tail gas of the internal combustion engine according to claim 8, wherein the flue gas inflow channel (2) is a single-layer diamond-like channel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111501725.5A CN114165318B (en) | 2021-12-09 | 2021-12-09 | Integrated device inner core for recovering and post-treating waste heat of tail gas of internal combustion engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111501725.5A CN114165318B (en) | 2021-12-09 | 2021-12-09 | Integrated device inner core for recovering and post-treating waste heat of tail gas of internal combustion engine |
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| CN114165318A true CN114165318A (en) | 2022-03-11 |
| CN114165318B CN114165318B (en) | 2023-07-25 |
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Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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